This is an important article because it explains why I probably have never seen a case of post-finasteride syndrome in the thousands of patients who were prescribed the drug by me over the past 2 decades. When someone complains of ED, I either reduce the dose until the symptoms go away, or discontinue the drug. According to this article, it takes years on the drug to get PFS. Since I am responsive to recommending withdrawal of the drug, the incidence in my practice is non-existent. The article itself has limitations in its methodology and as a definitive statement about the existence of post-finasteride syndrome or a disclosure of the risks, so it must be taken with a grain of salt.